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v3.20.4

Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2020
Hydro generation | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 1 year
Hydro generation | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 52 years
Wind generation | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 1 year
Wind generation | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 29 years
Gas generation | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 1 year
Gas generation | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 17 years
Coal generation | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 1 year
Coal generation | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 29 years
Mining property and equipment | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 1 year
Mining property and equipment | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 9 years
Capital spares and other | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 2 years
Capital spares and other | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 52 years
Facilities | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 30 years
Facilities | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Useful life measured as period of time, property, plant and equipment | 60 years
Software | Minimum |
Disclosure of detailed information about intangible assets [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 2 years
Software | Maximum |
Disclosure of detailed information about intangible assets [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 7 years
Power sale contracts | Minimum |
Disclosure of detailed information about intangible assets [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 1 year
Power sale contracts | Maximum |
Disclosure of detailed information about intangible assets [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 20 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2019-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_c&doctype=Standard -URIDate 2019-03-27 + Details
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